สืบค้นงานวิจัย
Flame retardants in urban air: A case study in Toronto targeting distinct source sectors
Saini A. - ไม่ระบุหน่วยงาน
ชื่อเรื่อง (EN): Flame retardants in urban air: A case study in Toronto targeting distinct source sectors
ผู้แต่ง / หัวหน้าโครงการ (EN): Saini A.
บทคัดย่อ (EN): Based on distinct land-use categories, a sampling campaign was carried out at eight locations across Toronto and the Greater Toronto Area in 2016–2017. Source sectors’ dependent patterns of atmospheric concentrations of 9 organophosphate esters (OPEs), 9 polybrominated diphenyl ethers (PBDEs) and 5 novel flame retardants (NFRs) showed dominance of OPEs and PBDEs at highly commercialised urban and traffic sites, while NFRs, were dominant at residential sites. Overall, average concentrations of Σ 9 OPEs (1790 pg/m 3 ) were two orders of magnitude higher than Σ 9 PBDEs (9.17 pg/m 3 ) and Σ 5 NFRs (8.14 pg/m 3 ). The atmospheric concentrations of given chemical classes also showed a general trend of lower levels in winter as compared to summer months. Statistically significant negative correlations between the natural logarithm of concentrations and inverse of temperature for some OPEs and PBDEs highlighted the role of volatilization from local sources at given sites as primarily influencing their atmospheric concentrations. Overall, this study adds to the current knowledge of urban settings as a major emitter of the chemicals of emerging concern and their replacements, as well as the ongoing problem of phased out PBDEs due to their presence in existing inventories of commercial/recycled products. It is recommended that long-term monitoring programs targeting flame retardants (FRs) include urban sites, which provide an early indicator of effectiveness of control measures of targeted FRs, while at the same time providing information on emission sources and trends of replacement FR chemicals. © 2019Source sectors based concentrations of three classes of flame retardants in an urban environment. © 2019
บทคัดย่อ: ไม่พบข้อมูลจากหน่วยงานต้นทาง
ภาษา (EN): en
เอกสารแนบ (EN): https://www.scopus.com/inward/record.uri?eid=2-s2.0-85060956158&doi=10.1016%2fj.envpol.2019.01.027&partnerID=40&md5=5202e8ae3d9bb75acde24ca4ce60ec78
เผยแพร่โดย (EN): มหาวิทยาลัยมหิดล
คำสำคัญ (EN): Volatilization
เจ้าของลิขสิทธิ์ (EN): มหาวิทยาลัยมหิดล
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Saini A.. "Flame retardants in urban air: A case study in Toronto targeting distinct source sectors". ไม่ระบุหน่วยงาน. ม.ป.ป.

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Flame retardants in urban air: A case study in Toronto targeting distinct source sectors
Saini A.
มหาวิทยาลัยมหิดล
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